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公开(公告)号:EP0135256A1
公开(公告)日:1985-03-27
申请号:EP84304078.3
申请日:1984-06-18
申请人: EATON CORPORATION
CPC分类号: F04C18/126 , F04C29/005
摘要: An improved Roots-type blower (10) and fixture (200) for timing rotors (20, 22) and timing gears (36, 38) of the blower during assembly. The blower includes a housing (12) defining generally cylindrical chambers containing the rotors having meshed, helical lobes (20c, 22c). The rotors are fixed to stepped diameter shafts (24, 26) pressed into stepped bores (20d, 22d) in the rotors. Straight splines on the shafts respectively form mating splines in the rotor bores and in the hub bore of timing gear (36). In a modified form of the blower, the straight splines form matting splines in both timing gears. The shafts are supported in the housing by fixed ball bearings (28, 30) at one end of the rotors and at the other end by ball bearing (32, 34) resiliently biased by springs which preload all four bearings. The fixture includes a base (202) having two surfaces (202f, 240a) for supporting ends (20b, 22b) of the rotors. Surface (202f) is integral with the base and surface (240a) is rotatable relative to surface (202f). The surfaces transversely space the shafts and rotors the same parallel distance apart they will have after final assembly of the blower and provide support of pressing the gears on the shafts. An annular gear (246), fixed to surface (240a) and having the same pitch diameter of rotor lobes (20c, 22c), drives a rack gear (260) which in turn drives a dial indicator (282) providing a direct readout of backlash between the lobe in response to rotation of surface (240a). Springs (268, 272) resiliently bias the rack gear into the annular gear to remove backlash.
摘要翻译: 一种改进的罗茨式鼓风机(10)和固定装置(200),用于在组装期间对鼓风机的转子(20,22)和正时齿轮(36,38)进行定时。 鼓风机包括限定大致圆柱形腔室的壳体(12),腔室容纳具有啮合的螺旋凸角(20c,22c)的转子。 转子固定在阶梯式直径轴(24,26)上,该轴被压入转子中的阶梯孔(20d,22d)中。 轴上的直线花键分别形成转子孔中和定时齿轮(36)的轮毂孔中的配合花键。 在鼓风机的改进形式中,直齿条在两个正时齿轮中形成消光花键。 轴通过位于转子一端的固定滚珠轴承(28,30)支撑在壳体中,另一端由滚珠轴承(32,34)支撑在壳体中,滚珠轴承(32,34)由预加载所有四个轴承的弹簧弹性偏置。 该夹具包括具有用于支撑转子的端部(20b,22b)的两个表面(202f,240a)的基座(202)。 表面(202f)与底座成一体并且表面(240a)可相对于表面(202f)旋转。 这些表面将轴和转子横向间隔开,它们在鼓风机的最终组装之后将具有相同的平行距离,并且提供对齿轮在轴上的按压的支撑。 固定到表面240a并且具有相同的转子凸角20c,22c的节圆直径的环形齿轮246驱动齿条260,齿条260又驱动百分表指示器282提供直接读出 响应于表面(240a)的旋转而在叶片之间产生齿隙。 弹簧(268,272)弹性地将齿条偏置到环形齿轮中以消除齿隙。
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公开(公告)号:EP0135257B1
公开(公告)日:1987-12-09
申请号:EP84304080.9
申请日:1984-06-18
申请人: EATON CORPORATION
CPC分类号: F04C29/005 , F04C29/0042 , Y10T29/49329 , Y10T29/49833 , Y10T29/49945
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公开(公告)号:EP0135257A1
公开(公告)日:1985-03-27
申请号:EP84304080.9
申请日:1984-06-18
申请人: EATON CORPORATION
CPC分类号: F04C29/005 , F04C29/0042 , Y10T29/49329 , Y10T29/49833 , Y10T29/49945
摘要: An improved supercharger (10) of the Roots-type. The supercharger includes a three-piece housing assembly (14, 16, 18) defining generally cylindrical chambers containing two rotors (20, 22) having meshed lobes (20c, 22c) of modified involute profile which pump air from an unshown inlet to an outlet (56). The rotors are fixed to stepped diameter shafts (24, 26) pressed into centrally located through bores in the rotors. Straight splines (24e, 26e) on the shafts form mating splines in the rotor bores to prevent rotation of the shafts in the bores. Bearing assembly (28, 30) disposed at adjacent ends (20a, 22a) of the rotors support one end of the rotors in the housing and fix the axial position of that end of rotors relative to the housing. Bearing assemblies (32, 34) at the outer adjacent ends (20b, 22b) of the rotors support the other end of the rotors in the housing. The bearing assemblies (32, 34) include inner races pressed on shaft bosses (24b, 26b) and outer races slidably disposed in wear-resistant sleeves pressed into bores in housing end section 18. The outer races of bearing assemblies (32, 34) are biased away from bearing assemblies (29, 30) to remove radial and axial bearing play in all of the bearing assemblies.
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公开(公告)号:EP0176268B1
公开(公告)日:1990-03-07
申请号:EP85306199.2
申请日:1985-09-02
申请人: EATON CORPORATION
IPC分类号: F04C18/12
CPC分类号: F04C18/088 , F04C18/16
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公开(公告)号:EP0135256B1
公开(公告)日:1988-05-25
申请号:EP84304078.3
申请日:1984-06-18
申请人: EATON CORPORATION
CPC分类号: F04C18/126 , F04C29/005
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公开(公告)号:EP0176268A1
公开(公告)日:1986-04-02
申请号:EP85306199.2
申请日:1985-09-02
申请人: EATON CORPORATION
IPC分类号: F04C18/12
CPC分类号: F04C18/088 , F04C18/16
摘要: An improved supercharger of blower (10) of the Roots-type with reduced airborne noise and improved efficiency. The blower includes a housing (12) defining generally cylindrical chambers (32, 34) containing meshed lobed rotors (14, 16) having the lobes (14a, 14b, 14c, 16a, 16b, 16c) thereon formed with an end-to-end helical twist according to the relation 360°/2n, where n equals the number of lobes per rotor. The chambers include cylindrical wall surfaces 20a, 20b and end wall surfaces 20c, 24a which sealing cooperate with the rotor lobes and ends. Blower housing (12) also defines inlet and outlet ports (36, 38). The inlet port includes a longitudinal extent defined by housing wall surfaces (20f, 20f) and a transverse extent defined by housing wall surfaces 20g, 20i. Transverse wall surfaces (20g, 20i) are disposed substantially parallel to the associated rotor lobes. The outlet port includes a longitudinal extent defined by housing surfaces (20m, 20r) and a transverse extent defined by housing surfaces (20p, 20s). Spaces (32a, 34a) between adjacent lobes of each rotor transfer volumes of low-pressure inlet port air to relatively high-pressure outlet port air. Associated with the outlet port are first and second expanding orifices (42, 44) disposed on transversely opposite sides of the outlet port for controlling the rate of backflow into the transfer volumes and operative at predetermined rotor speed and pressure differential relationships to maintain a substantially constant backflow rate into each of the transfer volumes. Pairs of arcuate channels 46, 48 and 58, 60 are respectively formed in end walls 20c, 24a to vent trapped volumes ΣTV 1 and ΣTV 2 defined by meshing lobes. Channels 46, 48 prevent compression of air in trapped volumes ΣTV 1 and channels ETV 2 prevent vacuum tending expansion of trapped volumes ΣTV 2 .
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